Al2O3 on Pt 04172018 
and 
TiO2 on Pt 04242018b
are the two datasets as recorded. 
The three columns in the files represent 
time(s), 
frequency (Hz), 
and conductance (V).

There are Excel files with same filenames, 
which are the respective data analysed and ploted.
The drift in frequency shifts have been corrected by
subtracting the slope of initial frequency vs. time curves.